Migrate vcs_map to use Lando API instead of cinnabar

[suhaibmujahid]

Examples:

• git2hg: https://lando.moz.tools/api/git2hg/firefox/e5c691fd077ad362c7b77fba6735c5838708458d
• hg2git: https://lando.moz.tools/api/hg2git/firefox/49a15db351436f31e932963eecb49e75634ca106

[suhaibmujahid]

We have it here:

libmozdata/libmozdata/lando.py

Lines 143 to 153 in 9eca321

	def git2hg(self, revision: str, repository="firefox") -> CommitMap:
	"""
	Convert a git hash into a mercurial one
	"""
	return self.request("git2hg", repository, revision)
	def hg2git(self, revision: str, repository="firefox") -> CommitMap:
	"""
	Convert a mercurial hash into a git one
	"""
	return self.request("hg2git", repository, revision)

We should deprecate vcs_map, and use this to provide the mapping to prevent breaking changes.